Valhalla 2300, Operation Manual

Page: 30 / 115

minus one (-1) and the PT ratio. Observe the
polarities of the potential transformers.
Caution! Do not exceed the common-mode
specifications of the Model 2300.
6-4-16. Three-Phase Three-Wire CT-
PT Source Power Connections
Some applications require measuring the
power from a source rather than the power
into a load. These connections are shown in
Figure 6-16. When the Model 2300 is
connected in this manner, the watts reading
should be multiplied by minus one (-1) and
the CT-PT ratios. Observe the polarities of
the current and potential transformers. For
best performance, the CURRENT COMMON
terminals should be grounded.
6-4-17. Three-Phase Four-Wire Load
Power Connections
Connect the wattmeter as shown in Figure 6-
17.
Caution! Do not run the neutral current
through the VOLTS COMMON terminals.
Tap off the neutral wire to connect the
VOLTS COMMON terminals.
6-4-18. Three-Phase Four-Wire CT
Load Power Connections
Connect the wattmeter as shown in Figure 6-
18. Observe the polarities of the current
transformers. The watts reading should be
multiplied by the CT ratio.
Caution! Do not
run the line or neutral currents through the
CURRENT or VOLTS COMMON terminals.
6-4-19.
Three-Phase Four-Wire PT
Load Power Connections
Connect the wattmeter as shown in Figure 6-
19. Observe the polarities of the potential
transformers. The watts reading should be
multiplied by PT ratio.
Caution! Do not
exceed the common mode specifications of
the Model 2300.
6-4-20. Three-phase Four-Wire CT-PT
Load Power Connections
Connect the wattmeter as shown in Figure 6-
20. Observe the polarities of the current and
potential transformers. The watts reading
should be multiplied by CT-PT ratios. For
best performance, ground the CURRENT
COMMON terminals.
6-4-21. Three-phase Four-Wire Source
Power Connections
Some applications require measuring the
power from a source rather than the power
into a load. These connections are shown in
Figure 6-21. When the Model 2300 is used in
this manner, the watts reading should be
multiplied by minus one (-1).
Caution! Do
not run the neutral current through the
VOLTS COMMON terminals. Tap off the
neutral wire to connect to the VOLTS
COMMON terminals.
6-4-22. Three-phase Four-Wire CT
Source Power Connections
Some applications require measuring the
power from a source rather than the power
into a load. These connections are shown in
Figure 6-22. When the Model 2300 is used in
this manner, the watts reading should be
multiplied by minus one (-1) and the CT ratio.
Observe the polarities of the current
transformers. Caution! Do not run the line
or neutral currents through the VOLTS
COMMON terminals. Tap off the line and
neutral wires to connect the VOLTS
COMMON terminals.